Option 2: WIN.INI File

Some email clients have options for setting the default MAPI client in the email application itself.

Select Start > Run > sysedit to edit the file.

Create an entry MAPI=1 under [Mail].

If you don't have a [Mail] section you can create one. [Mail]MAPI=1

If it continues to fail, search in help for your email client for MAPI and verify that it is MAPI compliant. Some email clients require that you configure them within the client to be the default MAPI email client.